Team CSC
DirectDrive

The CSC DirectDrive was formed to solve the
problem of an inefficient and heavy drive system found on a stock Polaris
snowmobile. The silver chain drive system (as seen in Fig. 1) is located in the
chassis opposite the engine output shaft. This requires the use of a jackshaft
(seen in figure 2) to transfer the power to the chain drive, then transfer the
power to the track.

The issue involved with this system are as follows:

Unneeded rotational mass in jackshaft

Inefficiencies due to chain tensioning

Chain stretch create inefficiencies

Jackshaft creates packaging issues with air box

Sound emission from system is relatively high

The chain drive mechanism has been the industry standard for
almost 40 years and due to advancements in gear technology and availability,
they present an opportunity for a more efficient and cost effective powertrain
system.